20x15 puzzle
Time:
5
1
5
1
4
1
4
1
4
1
2
4
1
2
4
1
1
1
1
1
3
2
1
1
2
3
1
2
1
2
5
1
5
3
5
8 4 4 4 3 1
 
 
 
 
1
3  1
7  2
2  4
2  1  1
7  2  4
10  8
7  9
19
7
9
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